Update of Booster Alignment & Magnet Moves
February 29, 2012
Bill Marsh, Kiyomi Seiya, Dean Still, Kent Triplet Alex Waller
Aperture scan
Orbit smooth
Alignment and Move
1, Take Position and Dipole current data with ACL scriptB:HP23L, B:VP23L, B:HL23T, B:VL23T*some data was missing on the file from ACL. *ACL script kept taking data every $17 event, even without beam.*Position data was taken on one pulse behind from the one corrector current was taken.*BPM offset from 5years ago.
2, Select data in a reasonable area which can make linear fitting.
3, Calculate scale and offset between position and dipole current.Long-23 H: scale= -0.80, offset= 10.81 (HP23L = scale * HL23T + offset) V: scale= 4.65, offset=-23.00 (VP23L = scale * VL23T + offset)
4, Reconstruct 20 x 20 dipole current data.Data1[H_1, V_1]
: ::
Data400[H_20, V_20]
5, Combined the dipole current and charge data with scale and offset.
Aperture scan and offline analysis(1)
with correctionsw/o corrections
Aperture scan and offline analysis(2)
New W75 is able to do analysis with the corrections.
Horizontal positions from scan
Horizontal aperture-25/+30 mm @ SHORT-15/+15 mm @LONG
Vertical positions from scan
Vertical aperture-7/+7mm @ SHORT-7/+12mm @LONG
bx @short = 33.7 bx @long = 6.1
by @short = 5.3 by @short = 20.4
H_emittance(95%) = 14p mmmradV_emittance(95%) = 16p mmmrad +/-21.5 mm
+/-1
7.9m
m
+/-9.12 mm+/
-9.1
5mm
@ SHORT @ LONG
H/V beam size at short and long
-10
-5
0
5
10
0 5 10 15 20 25
Horizontal long (HL)sperture center
original beam positionafter orbit smooth
beam
pos
ition
[mm
]
period
-6
-4
-2
0
2
4
6
0 5 10 15 20 25
Vertical long (VL)
VL_ap_center_wo_offbpm wo off before swo off - after
beam
pos
ition
[mm
]
period
-6
-4
-2
0
2
4
6
0 5 10 15 20 25
Vertical short (VS)
VS_ap_center_wo_offbpm wo off before swo off - after
beam
pos
ition
[mm
]period
-10
-5
0
5
10
0 5 10 15 20 25
Horizontal short (HS)HS_ap_center_wo_offbpm-h_wo_offbpm-H_wo_off-after
beam
pos
ition
[mm
]
period
Orbit smooth with B80
Desired position
Before smooth
After smooth
Intensity and beam loss after smoothAfter smoothBefore smooth
Corrector current after smooth
VerticalHorizontal
Aperture scanFinished at all 48 location.
All analysis process will be automated on W75
H aperture @ SHORT : -25/+30 mm ( beam size: +/- 21.5 mm) @ LONG : -15/+15 mm ( beam size: +/- 9.15 mm)
V aperture @ SHORT : -7/+7 mm ( beam size: +/- 9.12mm) @ LONG : -7/+12 mm ( beam size: +/- 17.9 mm)
Orbit smoothMoved beam position at injection to the aperture center at pd. 7 – pd. 23 using orbit smooth program.
Intensity and beam loss around rf periods were increased.
There was an offset on the horizontal corrector current.
Aperture restriction at short 14
Aperture scan with 3 bump + 5 bump
F D RF
Corrector+
BPM
Scan @ SHORT
Scan @ LONG
notcherV pinger
Ext. kicker
Col.6 ACol. 6B
Col. 7A
Ext. kicker BRF#2BRF#1
BRF#4BRF#3
BRF#6BRF#5
BRF#8BRF#7
BRF#19
BRF#9BRF#10
BRF#12BRF#11
BRF#14BRF#13
BRF#18BRF#17
BRF#16BRF#15
Components restricted aperture
V pingernocker
41.6
6mm
114.3mm
Short section with correctors
57.1
7mm
63.25mm
56.8
5mm
L2 (4 x ext. kickers)L12 (old H pinger, nocker, V pinger, ext. kicker)
-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
Charge 0 (Intensity) bpm MAP (mm) center (mm)
Ver
(mm
)
Hor (mm)
0.000
12.82
25.64
38.46
51.28
64.10
76.92
89.74
recalc long 12 b40 removed
chg0
Aperture @ L12 & L11
57.1
7mm
63.25mm
L5 with H pinger and notcher
-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
Charge 0 (Intensity) bpm MAP (mm) center (mm)
Ver
(mm
)
Hor (mm)
0.000
12.82
25.64
38.46
51.28
64.10
76.92
89.74
recalc long 5 b40 removed
chg0
Aperture @ L5
-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
Ver
(mm
)
Hor (mm)
0.000
12.82
25.64
38.46
51.28
64.10
76.92
89.74
recalc long 6 with B40 offset removed
chg0
ver bpm ver center
57.1
7mm
76.2
mm
L6 and L7 with collimators
L66A 6BShielding Shielding
6A CollimatorUpstream Bellows
> 1 inch
57.17mm
57.1
7mm
L14 – L24 with RF cavities
Radiation survey at L14 -24
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
0 1 2 3 4 5
del_X[m] Y[m]
del_
X[m
] Y[m]
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
5 6 7 8 9 10
del_X[m] Y[m]
del_
X[m
] Y[m]
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
10 11 12 13 14 15
del_X[m] Y[m]
del_
X[m
] Y[m]
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
15 16 17 18 19 20
del_X[m] Y[m]
del_
X[m
] Y[m]
L14 L15 L16 L17 L18
L19 L21 L22 L23 L24
BRF19
BRF18
RF cavity alignment error in H & V5mm
-30 -20 -10 0 10 20 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
-30 -20 -10 0 10 20 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
-30 -20 -10 0 10 20 30-30
-25
-20
-15
-10
-5
0
5
10
15
20
Charge 0 (Intensity) bpm MAP (mm) center (mm)
Ver
(mm
)
0.000
12.82
25.64
38.46
51.28
64.10
76.92
89.74
recalc long 19
chg0
hor bpm (mm)
Beam position at L19
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
0 5 10 15 20 25
D-UF-UF-DD-D
heig
ht[m
]
cell #
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
5 6 7 8 9 10
[m]
period
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
10 11 12 13 14 15
[m]
period
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
15 16 17 18 19 20
[m]
period
221.41
221.415
221.42
221.425
221.43
221.435
221.44
221.445
221.45
20 21 22 23 24 25
[m]
period
Vertical alignment error on F & D magnets5mm
Future plans
1. Align BRF#19, #18 and 17
2. Align Pinger and Notcher at L5
3. Align Ext. kickers, pinger and nocker at L2 & L12
4. Orbit smooth with B80 from injection to flattop and remove the momentum offset in the correctors.
5. Review beam positions at the collimators.
6. Move magnet @ period 15
